3 Terms, Definitions, and Conventions

3.3 Abbreviations and Symbols

Symbol	Definition
ERP	Enterprise Resource Planning
HMI	Human-Machine Interface
HTTP	Hypertext Transfer Protocol
IODD	IO-Link Device Description
IP	Internet Protocol
ISDU	Indexed Service Data Unit
MES	Manufacturing Execution System
PMS	Production Management System
SCADA	Supervisory Control And Data Acquisition
TCP	Transmission Control Protocol
UA	Unified Architecture
XML	Extensible Markup Language